The Power of Movement in Plants
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In our eReader you can find the full English version of the book. Read The Power of Movement in Plants Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book The Power of Movement in Plants
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from the apex for a few seconds with lunar caustic (nitrate of silver) ; and although the radicles had been wiped dry and the stick of caustic was dry, yet the part rubbed was much injured and a slight permanent depression was left. In such cases the opposite side continues to grow, and the radicle necessarily becomes bent towards the injured side.
But when a point 4 mm. from tiie apex was momen- tarily touched with dry caustic, it was only faintly discoloured, and no permanent injury was cause...d. This was shown by several radicles thus treated straighten- ing themselves after one or two days ; yet at first they became curved towards the touched side, as if they had been there subjected to slight continued pressure.
These cases deserve notice, because when one side of the apex was just touched with caustic, the radicle, as we have seen, curved itself in an opposite direction, that is, away from the touched side.
The radicle of the common pea at a point a little above the apex is rather more sensitive to continued pressure than that of the bean, and bends towards the pressed side.* We experimented on a variety (York- Sachs, ' A beilen Bot.
What to read after The Power of Movement in Plants?
You can find similar books in the "Read Also" column, or choose other free books by Darwin, Charles, 1809-1882 to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
from the apex for a few seconds with lunar caustic (nitrate of silver) ; and although the radicles had been wiped dry and the stick of caustic was dry, yet the part rubbed was much injured and a slight permanent depression was left. In such cases the opposite side continues to grow, and the radicle necessarily becomes bent towards the injured side.
But when a point 4 mm. from tiie apex was momen- tarily touched with dry caustic, it was only faintly discoloured, and no permanent injury was cause...d. This was shown by several radicles thus treated straighten- ing themselves after one or two days ; yet at first they became curved towards the touched side, as if they had been there subjected to slight continued pressure.
These cases deserve notice, because when one side of the apex was just touched with caustic, the radicle, as we have seen, curved itself in an opposite direction, that is, away from the touched side.
The radicle of the common pea at a point a little above the apex is rather more sensitive to continued pressure than that of the bean, and bends towards the pressed side.* We experimented on a variety (York- Sachs, ' A beilen Bot.
What to read after The Power of Movement in Plants?
You can find similar books in the "Read Also" column, or choose other free books by Darwin, Charles, 1809-1882 to read onlineMoreLess
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